Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b63fb1f54cc96c…

MALICIOUS

PDF

36.6 KB Created: 2020-08-30 08:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88cc3af3dec6354f54b7db8337bf0d4b SHA-1: 07afcd032a64118642286a8c9f8b3ff312f3bb0b SHA-256: 79b63fb1f54cc96c5bedc5a182934a825706b97e4ad8fa6f1ffadcb6ffcfcdc9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a keyword suggesting software. This indicates a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The presence of a large number of external PDF links, many pointing to benign Shopify domains, suggests a link farm used for SEO poisoning to drive traffic to malicious sites.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/wix?keyword=alienware+keyboard+software
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/kinetic_vs_potential_energy_worksheet_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0430/7350/3386/files/nigerian_nursery_school_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/sondaje_vesical_femenino.pdf
    • https://static.usrfiles.com/ugd/b8c837_311f7dd521204dd58dfe8bf5f63acd8d.pdf
    • https://static.usrfiles.com/ugd/9ea91e_2920ce65090d435b91395ede0d7d74fa.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_7202fb43532b41f9ab7064d4aa4de1c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2e93d614ef0489c8784e8870139b88a.pdf
    • https://static.usrfiles.com/ugd/b8c837_70871d3d0f7e48c7a2680046aef1b088.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc3a4bf614a94e6e851c34e062a6ec3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_713cf3315c39486a8fafe1f340c7bd80.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8d12838077847a99950e74cb370d10e.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/25176381557.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/dovuvixazi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050cb.bin
7e8d85d3759c26698761b304046556341ce5d70ad89795db1fc540a343198af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50CB 5288 bytes
font_01_sfnt_off000062e3.bin
9e714f283e96fe4a0a95f1145f270836f8a8ef42a0c058e74a5e7118908b5b59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 10204 bytes

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